Car-brake rigging.



N .801,675. PATENTED OCT. 10 1905.

O n. MOGARTHY.

OAR BRAKE RIGGING.

APPLICATION FILED JUNE 6, 1904.

n I NNNNX W1 CEEEEE UNITED STATES PATENT OFFICE.

CAR-BRAKE RIGGING.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed June 6,1904:- Serial No. 211,267.

To all 1117mm it may concern:

Be it known that I, DENNIs MCCARTHY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Car- Brake Rigging, of which the following is a specification.

The object of my invention is to increase the usefulness of any energy used to apply the brakes to the revolving car-wheels of a mod ern high-speed train, so that the brakes will not come off until the train stops. This object is secured by first changing the present dead lever into a live lever by means of sheave wheels fastened on the brake-levers, thus securing equal pressure on the car-wheels; second, by pulling on a spring and distending it instead of pulling flat against the car-wheel. The spring when so distended natural ly wants to regain its normal position, and thus draws each of the brake-levers together, and in addition the spring furnishes a differential pull on the brake-levers, so that the wheels will not slide at low speeds. It is also a shield and receives the violence of the shock which takes place when the brake-shoes strike the moving car-wheel, which throws the brake-shoes in opposite directions, thus making one brakeshoe pull the other on.

In the drawings, Figure 1 shows side view of device, showing how sheave-wheels are fastened on brake-levers with the spring placed between the brake-levers, with connectingchain extending from truck-bolster through sheave-wheel on the dead lever to spring, from thence to pulley or sheave wheel on live lever to pull-rod. Fig. 2 is an enlarged view of spring, showing slot for receiving chain for ad ustlng the brake.

In the drawings, numeral 1 is truck-bolster.

2 is slotted union for fastening chain 3 in slot 3. Union 2 may be engaged to car-bolster in any suitable manner.

6 is sheave-wheel engaged to live lever 8 by rod '7, while 10 is sheave-wheel engaged to dead brake-lever 11 by rod 16.

9 and 1:2 are brake-beams for live and dead brake-levers, respectively.

3 is a chain engaged to bolster 1 in slot 3 It extends to spring 4. through sheave-wheel 10. From opposite end of spring at it reaches pull-rod 5 through sheave-Wheel 6. Energy exerted on pull-rod 5 in direction indicated by arrow applies the brake.

In Fig. 2 is shown slot 4. At the left side chain 3 is in place in slot 4, while to the right slot P is shown empty. It is not of vital importance to the device where the slots are placed; but it is better to have slots at either end of the chain 3, so that the brake can be nicely adjusted. 15 is a supplementary spring placed in rods 13 and 14 for the purpose of connecting the bottom extremities of brakelevers. This spring should be three times stronger than spring 4.

Having now described my device, what I claim is- In a car-brake rigging, the combination of a sheave-wheel engaged to brake-lever in connection with spring suitably placed in brakegear, provided with slotted devices for receiving chain 3, for the purposes substantially as set forth and described.

DENNIS McCARTHY.

WVitnesses:

J. H. SUTHERLAND, ERIK ANDERSON. 

